AVer EXR5016_series user manual - Manual (Page 181)

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Appendix B Network Service Port
The following table shows the ports that DVR server uses for certain network service.
Port# Variable
Remote Console 5550 Y
WebViewer 80 Y
CM3000 80 Y
Firmware Update 5005 Y
DVR DDNS (Upload / Download) 53/1053 N